<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <button @click="addtext">点击添加文本</button><span v-if="isshow" style="color: red;">已经添加过了</span>
        <p>我叫王五</p><p>{{massage}}</p>
    </div>
    <script src="./node_modules/vue/dist/vue.js"></script>
    <script src="./js/test.js"></script>
</body>
</html>